Sealing cap for a safety container

Abstract

A sealing cap for a container provided with a safety valve is described, this sealing cap consisting of a bottom part which can be screwed onto the container neck and firmly locked there and of a top part which can be screwed onto the bottom part. The bottom part serves to seal absolutely the container neck provided with the safety valve, by compressing, in a moisture-tight manner, the joint between the edge of the container neck and a molding forming the valve support. The bottom part, fixed in position by retaining tabs and detent lugs, and capable of being loosened only by force, remains fixedly connected to the container during use. The top part can be unscrewed.

We claim: 
     
       1. A sealing cap particularly adapted for a container having a safety valve consisting of a conical valve supported by a cylindrical molding, controlled by a membrane and actuated by reducing the interior space of the interior of said container, the membrane having a central recess limited by a gasket through which a valve cone is inserted, said gasket bearing upon said valve cone and molded onto a cylindrical membrane carrier enclosing the upper edge region of the cylindrical section of the molding of the conical valve and resting by means of an outwardly projecting radial flange on an outwardly projecting radial collar of the molding of the valve support, said container further having an exterior thread situated on the neck thereof below the valve, and at least two retaining lugs situated on the neck thereof below said exterior threads, said sealing cap consisting of separable top and bottom members   said bottom member having internal thread means interactable with the external thread means of said container; and inwardly projecting step above said internal thread means, said step situated to rest firmly on the upper side of the flange of the membrane support of the container; at least two detent tabs situated on the inner wall thereof and interactable with said retaining lugs; and external thread means interactable with internal thread means situated on said separable top member;   said separable top member being a cap having internal thread means interactable with said external thread means of said bottom member.   
     
     
       2. A sealing cap as defined by claim 1 wherein said bottom member has an outwardly projecting step shoulder below said internal thread means, said step shoulder delimiting a protruding bottom section of said bottom member, said bottom section having said detent tabs molded onto the inner wall thereof. 
     
     
       3. A sealing cap as defined by claim 2 wherein said detent tabs are arranged to start from said step shoulder of said bottom member, said tabs being obliquely positioned to include an obtuse angle and with the inner wall of said bottom member in the direction of screwing-on rotation. 
     
     
       4. A sealing cap as defined by claim 1 wherein said top member is further defined as having a socket member attached to and projecting downwards from the top thereof, said socket enclosing said gasket of said container when said safety cap is in the closed position.